[fio.git] / verify.c

/*
 * IO verification helpers
 */
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>

#include "fio.h"

#include "crc/md5.h"
#include "crc/crc64.h"
#include "crc/crc32.h"
#include "crc/crc32c.h"
#include "crc/crc16.h"
#include "crc/crc7.h"
#include "crc/sha256.h"
#include "crc/sha512.h"

static void fill_random_bytes(struct thread_data *td, void *p, unsigned int len)
{
	unsigned int todo;
	int r;

	while (len) {
		r = os_random_long(&td->verify_state);

		/*
		 * lrand48_r seems to be broken and only fill the bottom
		 * 32-bits, even on 64-bit archs with 64-bit longs
		 */
		todo = sizeof(r);
		if (todo > len)
			todo = len;

		memcpy(p, &r, todo);

		len -= todo;
		p += todo;
	}
}

static void fill_pattern(struct thread_data *td, void *p, unsigned int len)
{
	switch (td->o.verify_pattern_bytes) {
	case 0:
		dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
		fill_random_bytes(td, p, len);
		break;
	case 1:
		dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len);
		memset(p, td->o.verify_pattern, len);
		break;
	case 2:
	case 3:
	case 4: {
		unsigned int pattern = td->o.verify_pattern;
		unsigned int i = 0;
		unsigned char c1, c2, c3, c4;
		unsigned char *b = p;

		dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n",
					td->o.verify_pattern_bytes, len);

		c1 = pattern & 0xff;
		pattern >>= 8;
		c2 = pattern & 0xff;
		pattern >>= 8;
		c3 = pattern & 0xff;
		pattern >>= 8;
		c4 = pattern & 0xff;

		while (i < len) {
			b[i++] = c1;
			if (i == len)
				break;
			b[i++] = c2;
			if (td->o.verify_pattern_bytes == 2 || i == len)
				continue;
			b[i++] = c3;
			if (td->o.verify_pattern_bytes == 3 || i == len)
				continue;
			b[i++] = c4;
		}
		break;
		}
	}
}

static void memswp(void *buf1, void *buf2, unsigned int len)
{
	char swap[200];

	assert(len <= sizeof(swap));

	memcpy(&swap, buf1, len);
	memcpy(buf1, buf2, len);
	memcpy(buf2, &swap, len);
}

static void hexdump(void *buffer, int len)
{
	unsigned char *p = buffer;
	int i;

	for (i = 0; i < len; i++)
		log_info("%02x", p[i]);
	log_info("\n");
}

/*
 * Prepare for seperation of verify_header and checksum header
 */
static inline unsigned int __hdr_size(int verify_type)
{
	unsigned int len = len;

	switch (verify_type) {
	case VERIFY_NONE:
	case VERIFY_NULL:
		len = 0;
		break;
	case VERIFY_MD5:
		len = sizeof(struct vhdr_md5);
		break;
	case VERIFY_CRC64:
		len = sizeof(struct vhdr_crc64);
		break;
	case VERIFY_CRC32C:
	case VERIFY_CRC32:
		len = sizeof(struct vhdr_crc32);
		break;
	case VERIFY_CRC16:
		len = sizeof(struct vhdr_crc16);
		break;
	case VERIFY_CRC7:
		len = sizeof(struct vhdr_crc7);
		break;
	case VERIFY_SHA256:
		len = sizeof(struct vhdr_sha256);
		break;
	case VERIFY_SHA512:
		len = sizeof(struct vhdr_sha512);
		break;
	case VERIFY_META:
		len = sizeof(struct vhdr_meta);
		break;
	default:
		log_err("fio: unknown verify header!\n");
		assert(0);
	}

	return len + sizeof(struct verify_header);
}

static inline unsigned int hdr_size(struct verify_header *hdr)
{
	return __hdr_size(hdr->verify_type);
}

static void *hdr_priv(struct verify_header *hdr)
{
	void *priv = hdr;

	return priv + sizeof(struct verify_header);
}

/*
 * Return data area 'header_num'
 */
static inline void *io_u_verify_off(struct verify_header *hdr,
				    struct io_u *io_u, unsigned char header_num)
{
	return io_u->buf + header_num * hdr->len + hdr_size(hdr);
}

static int verify_io_u_meta(struct verify_header *hdr, struct thread_data *td,
			    struct io_u *io_u, unsigned int header_num)
{
	struct vhdr_meta *vh = hdr_priv(hdr);

	dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);

	if (vh->offset != io_u->offset + header_num * td->o.verify_interval) {
		log_err("meta: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		return EIO;
	}

	return 0;
}

static int verify_io_u_sha512(struct verify_header *hdr, struct io_u *io_u,
			      unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_sha512 *vh = hdr_priv(hdr);
	uint8_t sha512[128];
	struct sha512_ctx sha512_ctx = {
		.buf = sha512,
	};

	dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", io_u, hdr->len);

	sha512_init(&sha512_ctx);
	sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));

	if (memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512))) {
		log_err("sha512: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		hexdump(vh->sha512, sizeof(vh->sha512));
		hexdump(sha512_ctx.buf, sizeof(sha512));
		return EIO;
	}

	return 0;
}

static int verify_io_u_sha256(struct verify_header *hdr, struct io_u *io_u,
			      unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_sha256 *vh = hdr_priv(hdr);
	uint8_t sha256[128];
	struct sha256_ctx sha256_ctx = {
		.buf = sha256,
	};

	dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", io_u, hdr->len);

	sha256_init(&sha256_ctx);
	sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));

	if (memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256))) {
		log_err("sha256: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		hexdump(vh->sha256, sizeof(vh->sha256));
		hexdump(sha256_ctx.buf, sizeof(sha256));
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u,
			    unsigned char header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc7 *vh = hdr_priv(hdr);
	unsigned char c;

	dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc7(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc7) {
		log_err("crc7: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc7: wanted %x, got %x\n", vh->crc7, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u,
			     unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc16 *vh = hdr_priv(hdr);
	unsigned short c;

	dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc16(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc16) {
		log_err("crc16: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc16: wanted %x, got %x\n", vh->crc16, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc64(struct verify_header *hdr, struct io_u *io_u,
			     unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc64 *vh = hdr_priv(hdr);
	unsigned long long c;

	dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc64(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc64) {
		log_err("crc64: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len,
				hdr->len);
		log_err("crc64: wanted %llx, got %llx\n",
					(unsigned long long) vh->crc64, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u,
			     unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc32 *vh = hdr_priv(hdr);
	uint32_t c;

	dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc32(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc32) {
		log_err("crc32: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc32: wanted %x, got %x\n", vh->crc32, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc32c(struct verify_header *hdr, struct io_u *io_u,
			      unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc32 *vh = hdr_priv(hdr);
	uint32_t c;

	dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc32c(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc32) {
		log_err("crc32c: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc32c: wanted %x, got %x\n", vh->crc32, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u,
			   unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_md5 *vh = hdr_priv(hdr);
	uint32_t hash[MD5_HASH_WORDS];
	struct md5_ctx md5_ctx = {
		.hash = hash,
	};

	dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", io_u, hdr->len);

	md5_init(&md5_ctx);
	md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));

	if (memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash))) {
		log_err("md5: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		hexdump(vh->md5_digest, sizeof(vh->md5_digest));
		hexdump(md5_ctx.hash, sizeof(hash));
		return EIO;
	}

	return 0;
}

static unsigned int hweight8(unsigned int w)
{
	unsigned int res = w - ((w >> 1) & 0x55);

	res = (res & 0x33) + ((res >> 2) & 0x33);
	return (res + (res >> 4)) & 0x0F;
}

int verify_io_u_pattern(unsigned long pattern, unsigned long pattern_size,
			char *buf, unsigned int len, unsigned int mod)
{
	unsigned int i;
	char split_pattern[4];

	for (i = 0; i < 4; i++) {
		split_pattern[i] = pattern & 0xff;
		pattern >>= 8;
	}

	for (i = 0; i < len; i++) {
		if (buf[i] != split_pattern[mod]) {
			unsigned int bits;

			bits = hweight8(buf[i] ^ split_pattern[mod]);
			log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
				buf[i], split_pattern[mod], bits);
			log_err("fio: bad pattern block offset %u\n", i);
			return EIO;
		}
		mod++;
		if (mod == pattern_size)
			mod = 0;
	}

	return 0;
}

int verify_io_u(struct thread_data *td, struct io_u *io_u)
{
	struct verify_header *hdr;
	unsigned int hdr_size, hdr_inc, hdr_num = 0;
	void *p;
	int ret;

	if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
		return 0;

	hdr_inc = io_u->buflen;
	if (td->o.verify_interval)
		hdr_inc = td->o.verify_interval;

	ret = 0;
	for (p = io_u->buf; p < io_u->buf + io_u->buflen;
	     p += hdr_inc, hdr_num++) {
		if (ret && td->o.verify_fatal) {
			td->terminate = 1;
			break;
		}
		hdr_size = __hdr_size(td->o.verify);
		if (td->o.verify_offset)
			memswp(p, p + td->o.verify_offset, hdr_size);
		hdr = p;

		if (hdr->fio_magic != FIO_HDR_MAGIC) {
			log_err("Bad verify header %x\n", hdr->fio_magic);
			return EIO;
		}

		if (td->o.verify_pattern_bytes) {
			dprint(FD_VERIFY, "pattern verify io_u %p, len %u\n",
								io_u, hdr->len);
			ret = verify_io_u_pattern(td->o.verify_pattern,
						  td->o.verify_pattern_bytes,
						  p + hdr_size,
						  hdr_inc - hdr_size,
						  hdr_size % 4);
			if (ret)
				log_err("fio: verify failed at %llu/%u\n",
					io_u->offset + hdr_num * hdr->len,
					hdr->len);
			continue;
		}

		switch (hdr->verify_type) {
		case VERIFY_MD5:
			ret = verify_io_u_md5(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC64:
			ret = verify_io_u_crc64(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC32C:
			ret = verify_io_u_crc32c(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC32:
			ret = verify_io_u_crc32(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC16:
			ret = verify_io_u_crc16(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC7:
			ret = verify_io_u_crc7(hdr, io_u, hdr_num);
			break;
		case VERIFY_SHA256:
			ret = verify_io_u_sha256(hdr, io_u, hdr_num);
			break;
		case VERIFY_SHA512:
			ret = verify_io_u_sha512(hdr, io_u, hdr_num);
			break;
		case VERIFY_META:
			ret = verify_io_u_meta(hdr, td, io_u, hdr_num);
			break;
		default:
			log_err("Bad verify type %u\n", hdr->verify_type);
			ret = EINVAL;
		}
	}

	return ret;
}

static void fill_meta(struct verify_header *hdr, struct thread_data *td,
		      struct io_u *io_u, unsigned int header_num)
{
	struct vhdr_meta *vh = hdr_priv(hdr);

	vh->thread = td->thread_number;

	vh->time_sec = io_u->start_time.tv_sec;
	vh->time_usec = io_u->start_time.tv_usec;

	vh->numberio = td->io_issues[DDIR_WRITE];

	vh->offset = io_u->offset + header_num * td->o.verify_interval;
}

static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_sha512 *vh = hdr_priv(hdr);
	struct sha512_ctx sha512_ctx = {
		.buf = vh->sha512,
	};

	sha512_init(&sha512_ctx);
	sha512_update(&sha512_ctx, p, len);
}

static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_sha256 *vh = hdr_priv(hdr);
	struct sha256_ctx sha256_ctx = {
		.buf = vh->sha256,
	};

	sha256_init(&sha256_ctx);
	sha256_update(&sha256_ctx, p, len);
}

static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc7 *vh = hdr_priv(hdr);

	vh->crc7 = crc7(p, len);
}

static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc16 *vh = hdr_priv(hdr);

	vh->crc16 = crc16(p, len);
}

static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc32 *vh = hdr_priv(hdr);

	vh->crc32 = crc32(p, len);
}

static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc32 *vh = hdr_priv(hdr);

	vh->crc32 = crc32c(p, len);
}

static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc64 *vh = hdr_priv(hdr);

	vh->crc64 = crc64(p, len);
}

static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_md5 *vh = hdr_priv(hdr);
	struct md5_ctx md5_ctx = {
		.hash = (uint32_t *) vh->md5_digest,
	};

	md5_init(&md5_ctx);
	md5_update(&md5_ctx, p, len);
}

/*
 * fill body of io_u->buf with random data and add a header with the
 * crc32 or md5 sum of that data.
 */
void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
{
	struct verify_header *hdr;
	void *p = io_u->buf, *data;
	unsigned int hdr_inc, data_len, header_num = 0;

	if (td->o.verify == VERIFY_NULL)
		return;

	fill_pattern(td, p, io_u->buflen);

	hdr_inc = io_u->buflen;
	if (td->o.verify_interval)
		hdr_inc = td->o.verify_interval;

	for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
		hdr = p;

		hdr->fio_magic = FIO_HDR_MAGIC;
		hdr->verify_type = td->o.verify;
		hdr->len = hdr_inc;
		data_len = hdr_inc - hdr_size(hdr);

		data = p + hdr_size(hdr);
		switch (td->o.verify) {
		case VERIFY_MD5:
			dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_md5(hdr, data, data_len);
			break;
		case VERIFY_CRC64:
			dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc64(hdr, data, data_len);
			break;
		case VERIFY_CRC32C:
			dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc32c(hdr, data, data_len);
			break;
		case VERIFY_CRC32:
			dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc32(hdr, data, data_len);
			break;
		case VERIFY_CRC16:
			dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc16(hdr, data, data_len);
			break;
		case VERIFY_CRC7:
			dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc7(hdr, data, data_len);
			break;
		case VERIFY_SHA256:
			dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_sha256(hdr, data, data_len);
			break;
		case VERIFY_SHA512:
			dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_sha512(hdr, data, data_len);
			break;
		case VERIFY_META:
			dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
							io_u, hdr->len);
			fill_meta(hdr, td, io_u, header_num);
			break;
		default:
			log_err("fio: bad verify type: %d\n", td->o.verify);
			assert(0);
		}
		if (td->o.verify_offset)
			memswp(p, p + td->o.verify_offset, hdr_size(hdr));
		header_num++;
	}
}

int get_next_verify(struct thread_data *td, struct io_u *io_u)
{
	struct io_piece *ipo = NULL;

	/*
	 * this io_u is from a requeue, we already filled the offsets
	 */
	if (io_u->file)
		return 0;

	if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
		struct rb_node *n = rb_first(&td->io_hist_tree);

		ipo = rb_entry(n, struct io_piece, rb_node);
		rb_erase(n, &td->io_hist_tree);
	} else if (!flist_empty(&td->io_hist_list)) {
		ipo = flist_entry(td->io_hist_list.next, struct io_piece, list);
		flist_del(&ipo->list);
	}

	if (ipo) {
		io_u->offset = ipo->offset;
		io_u->buflen = ipo->len;
		io_u->file = ipo->file;

		if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
			int r = td_io_open_file(td, io_u->file);

			if (r) {
				dprint(FD_VERIFY, "failed file %s open\n",
						io_u->file->file_name);
				return 1;
			}
		}

		get_file(ipo->file);
		assert(io_u->file->flags & FIO_FILE_OPEN);
		io_u->ddir = DDIR_READ;
		io_u->xfer_buf = io_u->buf;
		io_u->xfer_buflen = io_u->buflen;
		free(ipo);
		dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
		return 0;
	}

	dprint(FD_VERIFY, "get_next_verify: empty\n");
	return 1;
}
Commit	Line	Data
	1	/*
	2	* IO verification helpers
	3	*/
	4	#include <unistd.h>
	5	#include <fcntl.h>
	6	#include <string.h>
	7	#include <assert.h>
	8
	9	#include "fio.h"
	10
	11	#include "crc/md5.h"
	12	#include "crc/crc64.h"
	13	#include "crc/crc32.h"
	14	#include "crc/crc32c.h"
	15	#include "crc/crc16.h"
	16	#include "crc/crc7.h"
	17	#include "crc/sha256.h"
	18	#include "crc/sha512.h"
	19
	20	static void fill_random_bytes(struct thread_data td, void p, unsigned int len)
	21	{
	22	unsigned int todo;
	23	int r;
	24
	25	while (len) {
	26	r = os_random_long(&td->verify_state);
	27
	28	/*
	29	* lrand48_r seems to be broken and only fill the bottom
	30	* 32-bits, even on 64-bit archs with 64-bit longs
	31	*/
	32	todo = sizeof(r);
	33	if (todo > len)
	34	todo = len;
	35
	36	memcpy(p, &r, todo);
	37
	38	len -= todo;
	39	p += todo;
	40	}
	41	}
	42
	43	static void fill_pattern(struct thread_data td, void p, unsigned int len)
	44	{
	45	switch (td->o.verify_pattern_bytes) {
	46	case 0:
	47	dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
	48	fill_random_bytes(td, p, len);
	49	break;
	50	case 1:
	51	dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len);
	52	memset(p, td->o.verify_pattern, len);
	53	break;
	54	case 2:
	55	case 3:
	56	case 4: {
	57	unsigned int pattern = td->o.verify_pattern;
	58	unsigned int i = 0;
	59	unsigned char c1, c2, c3, c4;
	60	unsigned char *b = p;
	61
	62	dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n",
	63	td->o.verify_pattern_bytes, len);
	64
	65	c1 = pattern & 0xff;
	66	pattern >>= 8;
	67	c2 = pattern & 0xff;
	68	pattern >>= 8;
	69	c3 = pattern & 0xff;
	70	pattern >>= 8;
	71	c4 = pattern & 0xff;
	72
	73	while (i < len) {
	74	b[i++] = c1;
	75	if (i == len)
	76	break;
	77	b[i++] = c2;
	78	if (td->o.verify_pattern_bytes == 2 \|\| i == len)
	79	continue;
	80	b[i++] = c3;
	81	if (td->o.verify_pattern_bytes == 3 \|\| i == len)
	82	continue;
	83	b[i++] = c4;
	84	}
	85	break;
	86	}
	87	}
	88	}
	89
	90	static void memswp(void buf1, void buf2, unsigned int len)
	91	{
	92	char swap[200];
	93
	94	assert(len <= sizeof(swap));
	95
	96	memcpy(&swap, buf1, len);
	97	memcpy(buf1, buf2, len);
	98	memcpy(buf2, &swap, len);
	99	}
	100
	101	static void hexdump(void *buffer, int len)
	102	{
	103	unsigned char *p = buffer;
	104	int i;
	105
	106	for (i = 0; i < len; i++)
	107	log_info("%02x", p[i]);
	108	log_info("\n");
	109	}
	110
	111	/*
	112	* Prepare for seperation of verify_header and checksum header
	113	*/
	114	static inline unsigned int __hdr_size(int verify_type)
	115	{
	116	unsigned int len = len;
	117
	118	switch (verify_type) {
	119	case VERIFY_NONE:
	120	case VERIFY_NULL:
	121	len = 0;
	122	break;
	123	case VERIFY_MD5:
	124	len = sizeof(struct vhdr_md5);
	125	break;
	126	case VERIFY_CRC64:
	127	len = sizeof(struct vhdr_crc64);
	128	break;
	129	case VERIFY_CRC32C:
	130	case VERIFY_CRC32:
	131	len = sizeof(struct vhdr_crc32);
	132	break;
	133	case VERIFY_CRC16:
	134	len = sizeof(struct vhdr_crc16);
	135	break;
	136	case VERIFY_CRC7:
	137	len = sizeof(struct vhdr_crc7);
	138	break;
	139	case VERIFY_SHA256:
	140	len = sizeof(struct vhdr_sha256);
	141	break;
	142	case VERIFY_SHA512:
	143	len = sizeof(struct vhdr_sha512);
	144	break;
	145	case VERIFY_META:
	146	len = sizeof(struct vhdr_meta);
	147	break;
	148	default:
	149	log_err("fio: unknown verify header!\n");
	150	assert(0);
	151	}
	152
	153	return len + sizeof(struct verify_header);
	154	}
	155
	156	static inline unsigned int hdr_size(struct verify_header *hdr)
	157	{
	158	return __hdr_size(hdr->verify_type);
	159	}
	160
	161	static void hdr_priv(struct verify_header hdr)
	162	{
	163	void *priv = hdr;
	164
	165	return priv + sizeof(struct verify_header);
	166	}
	167
	168	/*
	169	* Return data area 'header_num'
	170	*/
	171	static inline void io_u_verify_off(struct verify_header hdr,
	172	struct io_u *io_u, unsigned char header_num)
	173	{
	174	return io_u->buf + header_num * hdr->len + hdr_size(hdr);
	175	}
	176
	177	static int verify_io_u_meta(struct verify_header hdr, struct thread_data td,
	178	struct io_u *io_u, unsigned int header_num)
	179	{
	180	struct vhdr_meta *vh = hdr_priv(hdr);
	181
	182	dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);
	183
	184	if (vh->offset != io_u->offset + header_num * td->o.verify_interval) {
	185	log_err("meta: verify failed at %llu/%u\n",
	186	io_u->offset + header_num * hdr->len, hdr->len);
	187	return EIO;
	188	}
	189
	190	return 0;
	191	}
	192
	193	static int verify_io_u_sha512(struct verify_header hdr, struct io_u io_u,
	194	unsigned int header_num)
	195	{
	196	void *p = io_u_verify_off(hdr, io_u, header_num);
	197	struct vhdr_sha512 *vh = hdr_priv(hdr);
	198	uint8_t sha512[128];
	199	struct sha512_ctx sha512_ctx = {
	200	.buf = sha512,
	201	};
	202
	203	dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", io_u, hdr->len);
	204
	205	sha512_init(&sha512_ctx);
	206	sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));
	207
	208	if (memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512))) {
	209	log_err("sha512: verify failed at %llu/%u\n",
	210	io_u->offset + header_num * hdr->len, hdr->len);
	211	hexdump(vh->sha512, sizeof(vh->sha512));
	212	hexdump(sha512_ctx.buf, sizeof(sha512));
	213	return EIO;
	214	}
	215
	216	return 0;
	217	}
	218
	219	static int verify_io_u_sha256(struct verify_header hdr, struct io_u io_u,
	220	unsigned int header_num)
	221	{
	222	void *p = io_u_verify_off(hdr, io_u, header_num);
	223	struct vhdr_sha256 *vh = hdr_priv(hdr);
	224	uint8_t sha256[128];
	225	struct sha256_ctx sha256_ctx = {
	226	.buf = sha256,
	227	};
	228
	229	dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", io_u, hdr->len);
	230
	231	sha256_init(&sha256_ctx);
	232	sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));
	233
	234	if (memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256))) {
	235	log_err("sha256: verify failed at %llu/%u\n",
	236	io_u->offset + header_num * hdr->len, hdr->len);
	237	hexdump(vh->sha256, sizeof(vh->sha256));
	238	hexdump(sha256_ctx.buf, sizeof(sha256));
	239	return EIO;
	240	}
	241
	242	return 0;
	243	}
	244
	245	static int verify_io_u_crc7(struct verify_header hdr, struct io_u io_u,
	246	unsigned char header_num)
	247	{
	248	void *p = io_u_verify_off(hdr, io_u, header_num);
	249	struct vhdr_crc7 *vh = hdr_priv(hdr);
	250	unsigned char c;
	251
	252	dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", io_u, hdr->len);
	253
	254	c = crc7(p, hdr->len - hdr_size(hdr));
	255
	256	if (c != vh->crc7) {
	257	log_err("crc7: verify failed at %llu/%u\n",
	258	io_u->offset + header_num * hdr->len, hdr->len);
	259	log_err("crc7: wanted %x, got %x\n", vh->crc7, c);
	260	return EIO;
	261	}
	262
	263	return 0;
	264	}
	265
	266	static int verify_io_u_crc16(struct verify_header hdr, struct io_u io_u,
	267	unsigned int header_num)
	268	{
	269	void *p = io_u_verify_off(hdr, io_u, header_num);
	270	struct vhdr_crc16 *vh = hdr_priv(hdr);
	271	unsigned short c;
	272
	273	dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", io_u, hdr->len);
	274
	275	c = crc16(p, hdr->len - hdr_size(hdr));
	276
	277	if (c != vh->crc16) {
	278	log_err("crc16: verify failed at %llu/%u\n",
	279	io_u->offset + header_num * hdr->len, hdr->len);
	280	log_err("crc16: wanted %x, got %x\n", vh->crc16, c);
	281	return EIO;
	282	}
	283
	284	return 0;
	285	}
	286
	287	static int verify_io_u_crc64(struct verify_header hdr, struct io_u io_u,
	288	unsigned int header_num)
	289	{
	290	void *p = io_u_verify_off(hdr, io_u, header_num);
	291	struct vhdr_crc64 *vh = hdr_priv(hdr);
	292	unsigned long long c;
	293
	294	dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", io_u, hdr->len);
	295
	296	c = crc64(p, hdr->len - hdr_size(hdr));
	297
	298	if (c != vh->crc64) {
	299	log_err("crc64: verify failed at %llu/%u\n",
	300	io_u->offset + header_num * hdr->len,
	301	hdr->len);
	302	log_err("crc64: wanted %llx, got %llx\n",
	303	(unsigned long long) vh->crc64, c);
	304	return EIO;
	305	}
	306
	307	return 0;
	308	}
	309
	310	static int verify_io_u_crc32(struct verify_header hdr, struct io_u io_u,
	311	unsigned int header_num)
	312	{
	313	void *p = io_u_verify_off(hdr, io_u, header_num);
	314	struct vhdr_crc32 *vh = hdr_priv(hdr);
	315	uint32_t c;
	316
	317	dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", io_u, hdr->len);
	318
	319	c = crc32(p, hdr->len - hdr_size(hdr));
	320
	321	if (c != vh->crc32) {
	322	log_err("crc32: verify failed at %llu/%u\n",
	323	io_u->offset + header_num * hdr->len, hdr->len);
	324	log_err("crc32: wanted %x, got %x\n", vh->crc32, c);
	325	return EIO;
	326	}
	327
	328	return 0;
	329	}
	330
	331	static int verify_io_u_crc32c(struct verify_header hdr, struct io_u io_u,
	332	unsigned int header_num)
	333	{
	334	void *p = io_u_verify_off(hdr, io_u, header_num);
	335	struct vhdr_crc32 *vh = hdr_priv(hdr);
	336	uint32_t c;
	337
	338	dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", io_u, hdr->len);
	339
	340	c = crc32c(p, hdr->len - hdr_size(hdr));
	341
	342	if (c != vh->crc32) {
	343	log_err("crc32c: verify failed at %llu/%u\n",
	344	io_u->offset + header_num * hdr->len, hdr->len);
	345	log_err("crc32c: wanted %x, got %x\n", vh->crc32, c);
	346	return EIO;
	347	}
	348
	349	return 0;
	350	}
	351
	352	static int verify_io_u_md5(struct verify_header hdr, struct io_u io_u,
	353	unsigned int header_num)
	354	{
	355	void *p = io_u_verify_off(hdr, io_u, header_num);
	356	struct vhdr_md5 *vh = hdr_priv(hdr);
	357	uint32_t hash[MD5_HASH_WORDS];
	358	struct md5_ctx md5_ctx = {
	359	.hash = hash,
	360	};
	361
	362	dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", io_u, hdr->len);
	363
	364	md5_init(&md5_ctx);
	365	md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));
	366
	367	if (memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash))) {
	368	log_err("md5: verify failed at %llu/%u\n",
	369	io_u->offset + header_num * hdr->len, hdr->len);
	370	hexdump(vh->md5_digest, sizeof(vh->md5_digest));
	371	hexdump(md5_ctx.hash, sizeof(hash));
	372	return EIO;
	373	}
	374
	375	return 0;
	376	}
	377
	378	static unsigned int hweight8(unsigned int w)
	379	{
	380	unsigned int res = w - ((w >> 1) & 0x55);
	381
	382	res = (res & 0x33) + ((res >> 2) & 0x33);
	383	return (res + (res >> 4)) & 0x0F;
	384	}
	385
	386	int verify_io_u_pattern(unsigned long pattern, unsigned long pattern_size,
	387	char *buf, unsigned int len, unsigned int mod)
	388	{
	389	unsigned int i;
	390	char split_pattern[4];
	391
	392	for (i = 0; i < 4; i++) {
	393	split_pattern[i] = pattern & 0xff;
	394	pattern >>= 8;
	395	}
	396
	397	for (i = 0; i < len; i++) {
	398	if (buf[i] != split_pattern[mod]) {
	399	unsigned int bits;
	400
	401	bits = hweight8(buf[i] ^ split_pattern[mod]);
	402	log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
	403	buf[i], split_pattern[mod], bits);
	404	log_err("fio: bad pattern block offset %u\n", i);
	405	return EIO;
	406	}
	407	mod++;
	408	if (mod == pattern_size)
	409	mod = 0;
	410	}
	411
	412	return 0;
	413	}
	414
	415	int verify_io_u(struct thread_data td, struct io_u io_u)
	416	{
	417	struct verify_header *hdr;
	418	unsigned int hdr_size, hdr_inc, hdr_num = 0;
	419	void *p;
	420	int ret;
	421
	422	if (td->o.verify == VERIFY_NULL \|\| io_u->ddir != DDIR_READ)
	423	return 0;
	424
	425	hdr_inc = io_u->buflen;
	426	if (td->o.verify_interval)
	427	hdr_inc = td->o.verify_interval;
	428
	429	ret = 0;
	430	for (p = io_u->buf; p < io_u->buf + io_u->buflen;
	431	p += hdr_inc, hdr_num++) {
	432	if (ret && td->o.verify_fatal) {
	433	td->terminate = 1;
	434	break;
	435	}
	436	hdr_size = __hdr_size(td->o.verify);
	437	if (td->o.verify_offset)
	438	memswp(p, p + td->o.verify_offset, hdr_size);
	439	hdr = p;
	440
	441	if (hdr->fio_magic != FIO_HDR_MAGIC) {
	442	log_err("Bad verify header %x\n", hdr->fio_magic);
	443	return EIO;
	444	}
	445
	446	if (td->o.verify_pattern_bytes) {
	447	dprint(FD_VERIFY, "pattern verify io_u %p, len %u\n",
	448	io_u, hdr->len);
	449	ret = verify_io_u_pattern(td->o.verify_pattern,
	450	td->o.verify_pattern_bytes,
	451	p + hdr_size,
	452	hdr_inc - hdr_size,
	453	hdr_size % 4);
	454	if (ret)
	455	log_err("fio: verify failed at %llu/%u\n",
	456	io_u->offset + hdr_num * hdr->len,
	457	hdr->len);
	458	continue;
	459	}
	460
	461	switch (hdr->verify_type) {
	462	case VERIFY_MD5:
	463	ret = verify_io_u_md5(hdr, io_u, hdr_num);
	464	break;
	465	case VERIFY_CRC64:
	466	ret = verify_io_u_crc64(hdr, io_u, hdr_num);
	467	break;
	468	case VERIFY_CRC32C:
	469	ret = verify_io_u_crc32c(hdr, io_u, hdr_num);
	470	break;
	471	case VERIFY_CRC32:
	472	ret = verify_io_u_crc32(hdr, io_u, hdr_num);
	473	break;
	474	case VERIFY_CRC16:
	475	ret = verify_io_u_crc16(hdr, io_u, hdr_num);
	476	break;
	477	case VERIFY_CRC7:
	478	ret = verify_io_u_crc7(hdr, io_u, hdr_num);
	479	break;
	480	case VERIFY_SHA256:
	481	ret = verify_io_u_sha256(hdr, io_u, hdr_num);
	482	break;
	483	case VERIFY_SHA512:
	484	ret = verify_io_u_sha512(hdr, io_u, hdr_num);
	485	break;
	486	case VERIFY_META:
	487	ret = verify_io_u_meta(hdr, td, io_u, hdr_num);
	488	break;
	489	default:
	490	log_err("Bad verify type %u\n", hdr->verify_type);
	491	ret = EINVAL;
	492	}
	493	}
	494
	495	return ret;
	496	}
	497
	498	static void fill_meta(struct verify_header hdr, struct thread_data td,
	499	struct io_u *io_u, unsigned int header_num)
	500	{
	501	struct vhdr_meta *vh = hdr_priv(hdr);
	502
	503	vh->thread = td->thread_number;
	504
	505	vh->time_sec = io_u->start_time.tv_sec;
	506	vh->time_usec = io_u->start_time.tv_usec;
	507
	508	vh->numberio = td->io_issues[DDIR_WRITE];
	509
	510	vh->offset = io_u->offset + header_num * td->o.verify_interval;
	511	}
	512
	513	static void fill_sha512(struct verify_header hdr, void p, unsigned int len)
	514	{
	515	struct vhdr_sha512 *vh = hdr_priv(hdr);
	516	struct sha512_ctx sha512_ctx = {
	517	.buf = vh->sha512,
	518	};
	519
	520	sha512_init(&sha512_ctx);
	521	sha512_update(&sha512_ctx, p, len);
	522	}
	523
	524	static void fill_sha256(struct verify_header hdr, void p, unsigned int len)
	525	{
	526	struct vhdr_sha256 *vh = hdr_priv(hdr);
	527	struct sha256_ctx sha256_ctx = {
	528	.buf = vh->sha256,
	529	};
	530
	531	sha256_init(&sha256_ctx);
	532	sha256_update(&sha256_ctx, p, len);
	533	}
	534
	535	static void fill_crc7(struct verify_header hdr, void p, unsigned int len)
	536	{
	537	struct vhdr_crc7 *vh = hdr_priv(hdr);
	538
	539	vh->crc7 = crc7(p, len);
	540	}
	541
	542	static void fill_crc16(struct verify_header hdr, void p, unsigned int len)
	543	{
	544	struct vhdr_crc16 *vh = hdr_priv(hdr);
	545
	546	vh->crc16 = crc16(p, len);
	547	}
	548
	549	static void fill_crc32(struct verify_header hdr, void p, unsigned int len)
	550	{
	551	struct vhdr_crc32 *vh = hdr_priv(hdr);
	552
	553	vh->crc32 = crc32(p, len);
	554	}
	555
	556	static void fill_crc32c(struct verify_header hdr, void p, unsigned int len)
	557	{
	558	struct vhdr_crc32 *vh = hdr_priv(hdr);
	559
	560	vh->crc32 = crc32c(p, len);
	561	}
	562
	563	static void fill_crc64(struct verify_header hdr, void p, unsigned int len)
	564	{
	565	struct vhdr_crc64 *vh = hdr_priv(hdr);
	566
	567	vh->crc64 = crc64(p, len);
	568	}
	569
	570	static void fill_md5(struct verify_header hdr, void p, unsigned int len)
	571	{
	572	struct vhdr_md5 *vh = hdr_priv(hdr);
	573	struct md5_ctx md5_ctx = {
	574	.hash = (uint32_t *) vh->md5_digest,
	575	};
	576
	577	md5_init(&md5_ctx);
	578	md5_update(&md5_ctx, p, len);
	579	}
	580
	581	/*
	582	* fill body of io_u->buf with random data and add a header with the
	583	* crc32 or md5 sum of that data.
	584	*/
	585	void populate_verify_io_u(struct thread_data td, struct io_u io_u)
	586	{
	587	struct verify_header *hdr;
	588	void p = io_u->buf, data;
	589	unsigned int hdr_inc, data_len, header_num = 0;
	590
	591	if (td->o.verify == VERIFY_NULL)
	592	return;
	593
	594	fill_pattern(td, p, io_u->buflen);
	595
	596	hdr_inc = io_u->buflen;
	597	if (td->o.verify_interval)
	598	hdr_inc = td->o.verify_interval;
	599
	600	for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
	601	hdr = p;
	602
	603	hdr->fio_magic = FIO_HDR_MAGIC;
	604	hdr->verify_type = td->o.verify;
	605	hdr->len = hdr_inc;
	606	data_len = hdr_inc - hdr_size(hdr);
	607
	608	data = p + hdr_size(hdr);
	609	switch (td->o.verify) {
	610	case VERIFY_MD5:
	611	dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
	612	io_u, hdr->len);
	613	fill_md5(hdr, data, data_len);
	614	break;
	615	case VERIFY_CRC64:
	616	dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
	617	io_u, hdr->len);
	618	fill_crc64(hdr, data, data_len);
	619	break;
	620	case VERIFY_CRC32C:
	621	dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
	622	io_u, hdr->len);
	623	fill_crc32c(hdr, data, data_len);
	624	break;
	625	case VERIFY_CRC32:
	626	dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
	627	io_u, hdr->len);
	628	fill_crc32(hdr, data, data_len);
	629	break;
	630	case VERIFY_CRC16:
	631	dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
	632	io_u, hdr->len);
	633	fill_crc16(hdr, data, data_len);
	634	break;
	635	case VERIFY_CRC7:
	636	dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
	637	io_u, hdr->len);
	638	fill_crc7(hdr, data, data_len);
	639	break;
	640	case VERIFY_SHA256:
	641	dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
	642	io_u, hdr->len);
	643	fill_sha256(hdr, data, data_len);
	644	break;
	645	case VERIFY_SHA512:
	646	dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
	647	io_u, hdr->len);
	648	fill_sha512(hdr, data, data_len);
	649	break;
	650	case VERIFY_META:
	651	dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
	652	io_u, hdr->len);
	653	fill_meta(hdr, td, io_u, header_num);
	654	break;
	655	default:
	656	log_err("fio: bad verify type: %d\n", td->o.verify);
	657	assert(0);
	658	}
	659	if (td->o.verify_offset)
	660	memswp(p, p + td->o.verify_offset, hdr_size(hdr));
	661	header_num++;
	662	}
	663	}
	664
	665	int get_next_verify(struct thread_data td, struct io_u io_u)
	666	{
	667	struct io_piece *ipo = NULL;
	668
	669	/*
	670	* this io_u is from a requeue, we already filled the offsets
	671	*/
	672	if (io_u->file)
	673	return 0;
	674
	675	if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
	676	struct rb_node *n = rb_first(&td->io_hist_tree);
	677
	678	ipo = rb_entry(n, struct io_piece, rb_node);
	679	rb_erase(n, &td->io_hist_tree);
	680	} else if (!flist_empty(&td->io_hist_list)) {
	681	ipo = flist_entry(td->io_hist_list.next, struct io_piece, list);
	682	flist_del(&ipo->list);
	683	}
	684
	685	if (ipo) {
	686	io_u->offset = ipo->offset;
	687	io_u->buflen = ipo->len;
	688	io_u->file = ipo->file;
	689
	690	if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
	691	int r = td_io_open_file(td, io_u->file);
	692
	693	if (r) {
	694	dprint(FD_VERIFY, "failed file %s open\n",
	695	io_u->file->file_name);
	696	return 1;
	697	}
	698	}
	699
	700	get_file(ipo->file);
	701	assert(io_u->file->flags & FIO_FILE_OPEN);
	702	io_u->ddir = DDIR_READ;
	703	io_u->xfer_buf = io_u->buf;
	704	io_u->xfer_buflen = io_u->buflen;
	705	free(ipo);
	706	dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
	707	return 0;
	708	}
	709
	710	dprint(FD_VERIFY, "get_next_verify: empty\n");
	711	return 1;
	712	}